Answer the following statements true (T) or false (F)
1. The smallest scale of biological organization is represented organelles.
2. Decomposers are a special group of producers.
3. In an experiment designed to determine if a fertilizer increased crop yield in tomato plants, the number of tomatoes produced by each plant would be the independent variable.
4. In an experiment designed to determine if a fertilizer increased crop yield in tomato plants, the number of tomatoes produced by each plant would be the dependent variable.
5. In an experiment designed to determine if a fertilizer increased crop yield in tomato plants, the amount of sunlight and water the plants received would be standardized variables.
1. FALSE
Life has a chemical makeup at two smaller scales than cells and their components. Read section 1.1.A for more information on the different scales of biological organization.
2. FALSE
The decomposers survive by breaking down the molecules and cells of organisms that have died, and are heterotrophs, because they cannot produce their own nutrient molecules from nonliving environmental resources. Read section 1.1.B for more information.
3. FALSE
Fertilizer effects on the size and numbers of tomatoes produced by the plants would be a specific variable of interest in response to fertilizer application. Read section 1.3.B for more information.
4. TRUE
The number or size of tomatoes produced by tomato plants is a variable that the researcher can assess as having any response to the application of fertilizer. Read section 1.3.B for more information.
5. TRUE
Standardized variables are held constant by researchers, so that no other factors besides the variables being manipulated for comparison will cause variation. Read section 1.3.B for more information.
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